/*
 * Copyright 2017 by Simba Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.spark.sql.simba.util

import org.apache.spark.sql.catalyst.expressions.Literal
import org.apache.spark.sql.types._

/**
  * Created by dongx on 11/7/2016.
  */
object NumberUtil {
  def literalToDouble(x: Literal): Double = {
    x.value match {
      case double_value: Number =>
        double_value.doubleValue()
      case decimal_value: Decimal =>
        decimal_value.toDouble
    }
  }

  def isIntegral(x: DataType): Boolean = {
    x match {
      case IntegerType => true
      case LongType => true
      case ShortType => true
      case ByteType => true
      case _ => false
    }
  }
}
